CN114875771A - Design and construction method of track-laying base bridge - Google Patents
Design and construction method of track-laying base bridge Download PDFInfo
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- CN114875771A CN114875771A CN202210406458.1A CN202210406458A CN114875771A CN 114875771 A CN114875771 A CN 114875771A CN 202210406458 A CN202210406458 A CN 202210406458A CN 114875771 A CN114875771 A CN 114875771A
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- 238000010276 construction Methods 0.000 title claims abstract description 19
- 238000013461 design Methods 0.000 title claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 230000007704 transition Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 2
- 239000011150 reinforced concrete Substances 0.000 description 3
- 102000010637 Aquaporins Human genes 0.000 description 1
- 108010063290 Aquaporins Proteins 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D15/00—Movable or portable bridges; Floating bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a design and construction method of a track-laying base bridge, wherein a bridge body of a newly-built railway line in a track-laying line access range is designed into a frame bridge, the frame bridge is connected with a roadbed of the track-laying line through a steel temporary beam, and the track-laying line is connected and communicated with the newly-built railway line by laying a temporary track and a turnout on the frame bridge; performing on-line operation on the newly-built railway line by using the connected and communicated track laying line and the newly-built railway line; after the on-line operation is completed, the temporary tracks and turnouts on the frame bridges are removed, part of bridge bodies of the frame bridges are chiseled, the rest of the bridge bodies of the frame bridges are used as the permanent utilization part of the newly-built railway line to bear load, and the steel temporary beam is removed and recycled. The invention has the advantages that: the newly-built frame bridge part can be used for a permanent structure and a steel temporary bridge and can be recycled, the temporary frame part and the permanent frame part form an integral structure, and the requirements of turnout deformation and line spacing widening are met.
Description
Technical Field
The invention relates to the technical field of railway bridges, in particular to a design and construction method of a track-laying base bridge, which is mainly applied to a newly-built railway bridge at a track-laying base of railway engineering, can be temporarily used during track laying and can also be permanently used.
Background
The track laying base is a place for storing equipment and facilities such as railway ballasts, turnouts, long rails, sleepers, fastening fittings and the like of a newly-built railway, and the track laying base can be used for carrying out construction production work such as locomotive maintenance, shunting operation, marshalling, loading and unloading and the like. The track laying base is generally arranged near the existing railway station, and the existing transportation channel, water source and power supply are fully utilized to carry out construction work during construction.
In general, a track laying base is selected near a railway roadbed station, the roadbed of the track laying base is connected with a roadbed of a newly-built railway, a temporary track is laid, and sleepers, fastening fittings, steel rails and the like are transported to the newly-built railway.
When all the new railways are bridges, the track laying base is not connected with the new railway roadbed condition, and switches are required to be arranged when the track laying base is connected with the new railway. The turnout is a weak link of the track, and the turnout is placed on the whole structure according to the design requirement of the track, so that uneven settlement is reduced as much as possible. There are generally two approaches: firstly, newly-built whole hole continuous switch roof beam, but, the engineering time is longer, the construction is complicated, the track is accomplished to the circuit and is spread the rail mission back switch roof beam idle, and is comparatively extravagant, and newly-built railway bridge's wide sudden change of roof beam also influences the view. Secondly, lay the temporary road bed first, demolish the road bed after accomplishing the rail laying, however, this scheme is demolishd and is built the bridge after the road bed, and the construction time is longer, also uneconomic.
Disclosure of Invention
The invention aims to provide a design and construction method of a track-laying base bridge according to the defects of the prior art, wherein a beam bridge of a track laying line connected into a newly-built railway range is changed into a frame bridge, a turnout is placed on the frame bridge, and the frame bridge is connected with a track laying line roadbed through a steel beam; after the track laying line is stopped, chiseling partial frames which are not used any more in the newly-built railway line, bearing train load according to the permanent structure by the frames under the newly-built railway line, recovering steel beams and realizing the connection transition of the permanent structure and the temporary structure.
The purpose of the invention is realized by the following technical scheme:
a design and construction method of a track-laying base bridge is used for realizing the connection and intercommunication between a track laying line and a newly-built railway line, and is characterized in that:
designing a bridge body of the newly-built railway line within the access range of the track laying line as a frame bridge, wherein the frame bridge is used for connecting the track laying line with the newly-built railway line;
connecting the frame bridge with a roadbed of the track laying line through a steel beam, and laying a temporary track and a turnout on the frame bridge to connect and communicate the track laying line with the newly-built railway line;
performing online operation on the newly-built railway line by using the track laying line and the newly-built railway line which are connected and communicated;
and after the on-line operation is finished, removing the temporary tracks and turnouts on the frame bridge, chiseling off part of bridge bodies of the frame bridge, using the rest frame bridge bodies as the permanent utilization part of the newly-built railway line to bear load, and removing and recycling the steel temporary beam.
The bridge body widths of the frame bridge in the access range are different, and the bridge width of the frame bridge gradually becomes wider from the newly-built railway line to the track laying line, so that the installation requirement of laying the turnout is met.
The frame bridge is composed of a plurality of frame bridge bodies, the bridge width of each frame bridge body gradually widens from the newly-built railway line to the track laying line, and the installation requirements of turnouts arranged above the newly-built railway line are met.
And taking the part with the minimum bridge width of the frame bridge as the reference of a permanent utilization structure, and chiseling out the bridge body of the frame bridge of the rest temporary transition part.
The permanent utilization part and the temporary transition part are divided by a settlement joint.
And the frame bridge is directly connected with a newly-built abutment of the newly-built railway line.
The invention has the advantages that: the difficult problem that the track-laying base line is directly connected to the newly-built railway bridge is solved. The newly-built frame bridge part can be used for a permanent structure and a steel temporary bridge and can be recycled, the temporary frame part and the permanent frame part form an integral structure, the requirements of turnout deformation and line spacing widening are met, and the vertical section of an access line can be reduced due to the advantage of small thickness of a frame top plate; the construction is convenient, economic and reasonable, the effect is good, and the popularization and use values are high.
Drawings
FIG. 1 is a plan view of the present invention;
fig. 2 is an elevational view of the present invention.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings to facilitate understanding by those skilled in the art:
as shown in fig. 1-2, the symbols 1-15 in the figures are respectively expressed as: the novel railway bridge comprises a first frame bridge body 1, a second frame bridge body 2, a third frame bridge body 3, a fourth frame bridge body 4, a settlement joint 5, a steel temporary beam 6, a newly-built abutment 7, a newly-built pier 8, a simply-supported box beam 9, an existing railway line 10, an existing railway roadbed slope 11, a newly-built track laying line 12, a track laying line roadbed slope 13, a newly-built railway line 14 and a turnout 15.
Example (b): the design and construction method of the track-laying foundation ground bridge in the embodiment is used for realizing the connection between the track laying line and the newly-built railway line, and is further convenient for realizing the on-line operation of track laying operation and the like of the newly-built railway line. Specifically, as shown in fig. 1, the existing railway line center line 10 is located on the new railway line 14 side, and the new track laying work of the new railway line 14 is performed by installing the new track laying line 12 at the existing railway line 10. The existing railway line 10 is provided with an existing railway roadbed slope 11, and the newly-built track laying line 12 is provided with a track laying line roadbed slope 13.
Referring to fig. 1 and 2, the track-laying foundation ground bridge in the present embodiment is designed as a frame bridge in which a newly-built track laying line 12 is connected to a newly-built railway line 14, and is provided with a first frame bridge body 1, a second frame bridge body 2, a third frame bridge body 3, a fourth frame bridge body 4 and a steel girder 6. The bridge widths of the first frame bridge body 1, the second frame bridge body 2, the third frame bridge body 3 and the fourth frame bridge body 4 are different, and the bridge widths are gradually increased from the newly-built railway line 14 to the newly-built track laying line 12. And a turnout 15 is arranged above the frame bridge, and the frame bridge is connected with the roadbed of the newly-built track laying line 12 through a steel beam 6.
As shown in fig. 1, the first frame bridge 1 is the portion of the four frame bridges of the frame bridge having the smallest bridge width, and the entirety thereof is a permanently utilized portion, while the second frame bridge 2, the third frame bridge 3, and the third frame bridge 4 each have a permanently utilized portion and a temporary transition portion between which a settlement joint 5 is provided. The widths of the permanently utilized portions of the second frame-bridge 2, the third frame-bridge 3, and the third frame-bridge 4 are the same as the bridge width of the first frame-bridge 1. The permanent utilization part and the temporary transition part of the second frame bridge body 2, the third frame bridge body 3 and the third frame bridge body 4 are divided by arranging settlement joints 5; when the track laying line is stopped, the temporary transition part which is not used any more in the newly-built railway line 14 is chiseled along the settlement joint 5, the permanent utilization part under the newly-built railway line 14 bears the train load according to the permanent structure, and meanwhile, the steel beam 6 is recycled, so that the connection transition between the permanent structure and the temporary structure is realized.
In this embodiment, first frame pontic 1, second frame pontic 2, third frame pontic 3 and fourth frame pontic 4 are reinforced concrete structure, and its width combines switch 15 to arrange the position and confirms specific span, highly combines the high setting of circuit vertical section, and 14 direction length of the newly-built railway circuit of perpendicular combines the line interval change between newly-built track laying circuit 12 and the newly-built railway circuit 14 and the position setting of arranging of switch 15. The frame bridge is directly connected with a newly-built abutment 7 of a newly-built railway line 14.
As shown in fig. 1, the steel girder 6 is connected to the fourth frame bridge 4 at one side and to the roadbed of the track laying line 12 at the other side, and the foundation thereof may be an enlarged foundation or a pile foundation in combination with the geological conditions. The steel beam 6 can adopt a common D-shaped beam, the span is selected according to the requirement, and the height of the roadbed and the distance between the steel beam and the newly-built pier 8 of the newly-built railway line 14 are combined. The steel beam 6 can be recycled after the newly-built track laying line 12 is stopped.
As shown in fig. 2, the newly constructed railroad line 14 is erected on the newly constructed railroad bridge. This newly-built railway bridge roof beam is including newly-built abutment 7, newly-built pier 8 and letter box girder 9, and wherein newly-built abutment 7 is reinforced concrete rectangle hollow abutment, and newly-built pier 8 is reinforced concrete pier, and letter box girder 9 is standard span prestressed concrete letter box girder commonly used.
The construction method comprises the following steps:
1) the method comprises the steps of cast-in-place construction of a first frame bridge body 1, a second frame bridge body 2, a third frame bridge body 3, a fourth frame bridge body 4 and a newly-built bridge abutment 7.
2) The foundation of the construction steel temporary beam 6 is connected with a frame bridge and a roadbed of a newly-built track laying line 12, and the steel temporary beam 6 is assembled on a hoisting site.
3) Temporary tracks and turnouts 15 are laid on the frame bridge, and temporary trains can enter the newly-built railway bridge of the newly-built railway line 14 from the newly-built track laying line 12 through the track laying base bridge which is permanently combined in the embodiment, so that on-line operation such as track laying is completed. At this time, the permanent utilization part and the temporary transition part of each frame bridge body of the frame bridge are used for bearing the load of the temporary train on the newly-built track laying line 12 as a whole.
4) After the track laying operation is finished, the temporary tracks and turnouts 15 on the bridge deck are removed, temporary transition parts of all frame bridge bodies except the settlement joints 5 are chiseled, and the steel temporary beams 6 are recovered.
5) And according to the standard of the newly-built railway bridge, finishing the residual construction operation of a bridge deck system and the like, and finishing the construction, wherein the permanently utilized part of the frame bridge positioned under the newly-built railway line 14 is used as a permanent structure to bear the load of the train.
In the embodiment, in specific implementation: the width of the first frame-bridge 1, the second frame-bridge 2, the third frame-bridge 3 and the fourth frame-bridge 4 may optionally be 8-16 m. The span of the steel beam 6 can be 24m or 16 m.
Except the separated frame bridge in the embodiment, an integral frame bridge can be arranged, namely four holes are connected into a whole and steel bars are bound together for pouring concrete, the length and the width of the integral frame bridge along the direction of a newly-built railway are determined according to the length and the angle of a temporary track-laying turnout structure, but the integral frame bridge is easy to crack due to too long structure, the problem can be avoided by the separated frame bridge in the embodiment, the bridge width in transition is reduced as much as possible, and the later chiseling is reduced.
In addition to the frame bridge composed of four frame bridge bodies in the present embodiment, in the actual design, the number of the frame bridge bodies may be increased or decreased according to the actual line condition and span condition, for example, a frame bridge composed of three or five frame bridge bodies is formed, and the total length of the plurality of frame bridges needs to meet the requirement of temporary switch arrangement.
When the permanent structure of the frame bridge body has the frame width of about 12m, the settlement joint 5 is not required to be arranged.
Although the conception and the embodiments of the present invention have been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the scope of the appended claims, and therefore, they are not to be considered repeated herein.
Claims (6)
1. A design and construction method of a track-laying base bridge is used for realizing the connection and intercommunication between a track laying line and a newly-built railway line, and is characterized in that:
designing a bridge body of the newly-built railway line within the access range of the track laying line as a frame bridge, wherein the frame bridge is used for connecting the track laying line with the newly-built railway line;
connecting the frame bridge with a roadbed of the track laying line through a steel beam, and laying a temporary track and a turnout on the frame bridge to connect and communicate the track laying line with the newly-built railway line;
performing on-line operation on the newly-built railway line by using the track laying line and the newly-built railway line which are connected and communicated;
and after the on-line operation is finished, removing the temporary tracks and turnouts on the frame bridge, chiseling off part of bridge bodies of the frame bridge, using the rest frame bridge bodies as the permanent utilization part of the newly-built railway line to bear load, and removing and recycling the steel temporary beam.
2. The method of claim 1, wherein the method comprises the steps of: the bridge body widths of the frame bridge in the access range are different, and the bridge width of the frame bridge gradually becomes wider from the newly-built railway line to the track laying line, so that the installation requirement of laying the turnout is met.
3. The method of claim 2, wherein the method comprises the steps of: the frame bridge is composed of a plurality of frame bridge bodies, the bridge width of each frame bridge body gradually widens from the newly-built railway line to the track laying line, and the installation requirements of turnouts arranged above the newly-built railway line are met.
4. The method of claim 2, wherein the method comprises the steps of: and taking the part with the minimum bridge width of the frame bridge as the reference of a permanent utilization structure, and chiseling out the bridge body of the frame bridge of the rest temporary transition part.
5. The method of claim 4, wherein the method comprises the steps of: the permanent utilization part and the temporary transition part are divided by a settlement joint.
6. The method of claim 1, wherein the method comprises the steps of: and the frame bridge is directly connected with a newly-built abutment of the newly-built railway line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210406458.1A CN114875771B (en) | 2022-04-18 | 2022-04-18 | Design and construction method of track laying base bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210406458.1A CN114875771B (en) | 2022-04-18 | 2022-04-18 | Design and construction method of track laying base bridge |
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| CN114875771A true CN114875771A (en) | 2022-08-09 |
| CN114875771B CN114875771B (en) | 2023-12-01 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10032448A1 (en) * | 2000-07-04 | 2002-01-17 | Heiko Tilebein | Method to replace esp. railway bridge with new bridge erected on newly constructed foundations while old bridge is till in situ, and without temporary bridge |
| CN111997406A (en) * | 2020-09-02 | 2020-11-27 | 中铁第六勘察设计院集团有限公司 | Transition transformation method for railway station yard |
| CN113026539A (en) * | 2021-04-16 | 2021-06-25 | 中铁第四勘察设计院集团有限公司 | Upper connecting rail structure of integral cast-in-place frame bridge and construction method |
| CN113944107A (en) * | 2021-10-28 | 2022-01-18 | 中铁二十局集团有限公司 | Land short pier bridge roadbed filling type bridge-climbing channel and construction method thereof |
| CN216006573U (en) * | 2021-09-26 | 2022-03-11 | 中铁上海设计院集团有限公司 | Novel bridge span structure for high-speed railway to span deep karst coverage area |
| CN217324965U (en) * | 2022-04-18 | 2022-08-30 | 中铁上海设计院集团有限公司 | Face track laying base bridge that combines forever |
-
2022
- 2022-04-18 CN CN202210406458.1A patent/CN114875771B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10032448A1 (en) * | 2000-07-04 | 2002-01-17 | Heiko Tilebein | Method to replace esp. railway bridge with new bridge erected on newly constructed foundations while old bridge is till in situ, and without temporary bridge |
| CN111997406A (en) * | 2020-09-02 | 2020-11-27 | 中铁第六勘察设计院集团有限公司 | Transition transformation method for railway station yard |
| CN113026539A (en) * | 2021-04-16 | 2021-06-25 | 中铁第四勘察设计院集团有限公司 | Upper connecting rail structure of integral cast-in-place frame bridge and construction method |
| CN216006573U (en) * | 2021-09-26 | 2022-03-11 | 中铁上海设计院集团有限公司 | Novel bridge span structure for high-speed railway to span deep karst coverage area |
| CN113944107A (en) * | 2021-10-28 | 2022-01-18 | 中铁二十局集团有限公司 | Land short pier bridge roadbed filling type bridge-climbing channel and construction method thereof |
| CN217324965U (en) * | 2022-04-18 | 2022-08-30 | 中铁上海设计院集团有限公司 | Face track laying base bridge that combines forever |
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| CN114875771B (en) | 2023-12-01 |
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Inventor after: Chen Jie Inventor after: Liu Jianhong Inventor after: Pan Xiangwen Inventor after: Dai Hanchao Inventor after: Zhao Zhiming Inventor after: Jiang Yong Inventor after: Liu Simeng Inventor after: Guo Hua Inventor after: Chen Niannian Inventor before: Chen Jie Inventor before: Pan Xiangwen Inventor before: Dai Hanchao Inventor before: Zhao Zhiming Inventor before: Jiang Yong Inventor before: Liu Simeng Inventor before: Guo Hua Inventor before: Chen Niannian |
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